Tables

Factor tables

A085398: Least k>1 such that n-th cyclotomic polynomial evaluated at k is prime

A001333: Numerators of continued fraction convergents to sqrt(2)

A000129: Pell numbers

A001110: Square triangular numbers

A024451: The numerator of Sum_{i = 1..n} 1/prime(i)

A343157: Trajectory of 407 under the map x -> A084317(x)

Download the latest factorsequence.html (Updated Jan 17 2023)

A128164 & A084742

n	A239279(n)
1	0
2	5
3	1
4	1
5	14
6	1
7	20
8	1
9	10
10	273
11	14
12	1
13	38
14	1
15	68
16	0
17	≥50000
18	1
19	72
20	1
21	32
22	≥30000
23	60
24	1
25	≥30000
26	≥30000
27	0
28	27375
29	98
30	1
31	42
32	1
33	2570
34	69
35	≥30000
36	0
37	786
38	1
39	1178
40	903
41	60
42	1
43	1622
44	1
45	≥30000
46	≥30000
47	110
48	1
49	720
50	87
51	≥30000
52	≥30000
53	≥30000
54	1
55	≥30000
56	295
57	250
58	93
59	3930
60	1
61	180
62	1
63	88
64	0
65	≥30000
66	245
67	2870
68	1
69	≥30000
70	2559
71	408
72	1
73	1248
74	1
75	≥30000
76	18735
77	≥30000
78	≥30000
79	≥30000
80	1
81	88
82	≥30000
83	486
84	1
85	1364
86	≥30000
87	≥30000
88	≥30000
89	≥30000
90	1
91	932
92	1447
93	278
94	≥30000
95	198
96	365
97	6006
98	1
99	2518